dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position

excessive bruising

headache

increased menstrual flow or vaginal bleeding

nosebleeds

paralysis

peeling of the skin

prolonged bleeding from cuts

red or black, tarry stools

red or dark brown urine

shortness of breath

sweating

unexplained swelling

unusual tiredness or weakness

Rare

Arm, back, or jaw pain

blue-green to black skin discoloration

blue or purple toes

change in consciousness

chest tightness or heaviness

chills

clay-colored stools

diarrhea

dizziness

fainting or loss of consciousness

fast or irregular breathing

fast or irregular heartbeat

fever

itching

light-colored stools

loss of appetite

nausea and vomiting

pain in the toes

pain, redness, or sloughing of the skin

pale skin

skin blisters

skin rash

small red or purple spots on the skin

stomach pain

swelling of the eyes or eyelids

tightness in the chest or wheezing

troubled breathing with exertion

unpleasant breath odor

unusual bleeding or bruising

upper right abdominal or stomach pain

vomiting of blood

yellow eyes and skin

Incidence not known

Painful or prolonged erection of the penis

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

Joint pain

muscle pain

Rare

Bloated

change in taste, or bad, unusual, or unpleasant (after) taste

cold intolerance

excess air or gas in the stomach or intestines

full feeling

general feeling of discomfort or illness

hair loss or thinning of the hair

hives or welts

lack or loss of strength

pain

passing gas

red, sore, or itching skin

sores, welting, or blisters

unusual drowsiness, dullness, or feeling of sluggishness

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.